Method of precipitating acid colors



UNITED STATES PATENT OFFICE.

AUGUST LENDLE, OF FOREST HTLLS, NEW YORK, ASS IGNOR TO'KU'ITROFE PICK- HARD'I. & 00., INQH, OF NEW YORK, N. Y., A CORPORATION OF YORK.

METHOD OF PRECIPITATING ACID COLORS.

No Drawing.

T 0 all whom it mag/concern:

Be it known that I, AUGUST LENDLE, a citizen of the United States, residing at Forest Hills, county of Queens, and State of New York, have invented new and useful Improvements in Methods of Precipitating Acid Colors, of which the following is a specification.

My invention comprises a new and improved method of precipitating certain acid colors. It is well known that many acid colors (such as scarlet, orange, alkali-blue, etc.,) are precipitated with salts,.such as, for instance, chlorid of barium, chlorid of calcium, sugar of lead, etc.

Heretofore, it has not been feasible to pre cipitate other acid colors (such as ,patent blue, acid green, erioglaucin, soluble blue,

acid violet, etc.,) with the same precipitating agents.

I have discovered that acid dyestuffs such as patent blue, acid green, erioglaucin, soluble blue, acid violet, etc., can now be pre- 4 cipitated substantially completely and perfectly if any of the known precipitating agents such as chlorid of barium, sugar of lead, etc., are used in connection with complex acids or their salts, containing an acid (such as phosphoric or silicic and tungsten or molybdenum.

The object of the present invention is to precipitate these colors into insoluble or difficultly soluble coloring matters in the presence or absence of substrata (such as, hydrate of alumina, blanc fixe, etc.) These then obtained coloring matters, or lakes are suitable for the manufacture of paints, printing inks, lithographic inks, etc.

The following is an example of suitable Specification of Letters Patent.

Patented May 17, 1921.

Application filed September 9, 1920. Serial No. 409,246.

procedure, but the invention is not restricted to this example.

100 lbs. acid green are dissolved in water to make a 1% solution; to this-is added a 10% watery solution 0f'200 lbs. 'chlorid of will be read to include molybdenum and the word acid will be read to include its salts.

I claim: V I

1. The method of precipitating acid colors, which consists in treating the same with a precipitating agent, and a complex acid containing an acid and tungsten. 2. The method of precipitating acid colors, which consists in treating the same with a precipitating agent, and a complex acid con- .taining phosphorus and tungsten. T 3. A coloring m'atterlake containing-the combination of an acid coal tar.coloring matter with a precipitating agent, anda complex acid containing an acid and tungsten.

l. A coloring matter lake containing the combination of an acid coal tar coloring matter with a precipitating agent, and a complex acid containing phosphorus and tungsten.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

AUGUST- LENDLE.

.Witnesses: I 4 WM. P. PIGKHARDT,

H. STOLZE. 

